Heating system of water purifier

Abstract

This utility model discloses a heating system for a water purifier, comprising: a hot water tank, including a tank body, an insulating shell covering the outside of the tank body, a heating element disposed within the inner cavity of the tank body, and a temperature fuse attached to the outer wall of the tank body; and a secondary water tank, located above the hot water tank body, including a secondary water tank body, a level gauge, a vent, and a steam condensation tank communicating with the upper part of the secondary water tank body; the bottom of the secondary water tank body is connected to the interior of the hot water tank body via a first channel pipe, and the bottom of the steam condensation tank is connected to the interior of the hot water tank body via a second channel pipe; the upper part of the secondary water tank body has a water inlet communicating with a water inlet pipe. This utility model places water level detection, venting, and condensation functions within the secondary water tank. The hot water tank is designed as a single, non-removable structure, while the secondary water tank is detachable, making production, testing, and troubleshooting easier and reducing the failure rate of the hot water tank.

Description

Technical Field

[0001] This utility model relates to the field of drinking water equipment technology. More specifically, this utility model relates to a heating system for a water purification machine. Background Technology

[0002] With market and technological development, household access to purified water has evolved from the traditional combination of water purifiers and faucets to integrated drinking water systems that combine purified water, hot water, warm water, and even ice water and sparkling water, commonly known as water purifiers. In markets such as China and the UK, hot water is the core drinking water need of consumers. Therefore, water purifiers with integrated hot water dispensing function will see increasing market demand and a promising business prospect.

[0003] Water purifiers with hot water functions commonly employ two heating methods: rapid heating and storage heating. Rapid heating, to obtain high-temperature hot water, results in a very low water flow rate, sometimes less than 0.5L / min, leading to a poor user experience. Storage heating, on the other hand, provides a large flow of hot water to meet frequent usage, but requires the integration of modules for venting, steam condensation, and water level detection. Current storage heating solutions typically integrate these functions directly into the hot water tank, increasing its structural complexity. This necessitates the inclusion of components such as level detection, venting valves, and condensation chambers, resulting in a bulky tank structure. Furthermore, it increases the failure rate; electronic components (such as level probes) are prone to scaling and failure due to prolonged contact with high-temperature water, and the steam condensation structure may experience venting problems due to scale blockage. Additionally, maintenance is difficult, as hot water tanks are often welded and sealed, requiring complete disassembly and repair in case of malfunction, leading to high maintenance costs. Utility Model Content

[0004] One object of this invention is to solve at least the problems described above and to provide at least the advantages that will be explained later.

[0005] Another objective of this invention is to provide a heating system for a water purifier that addresses the technical problem in the prior art where the required functional structures are directly integrated with the hot water tank, resulting in increased complexity of the hot water tank structure, increased failure rate, and increased difficulty in maintenance.

[0006] To achieve these objectives and other advantages according to the present invention, a heating system for a water purification mechanism is provided, comprising: A hot water tank includes a tank body, an insulating shell covering the outside of the tank body, a heating element inside the tank body, and a temperature fuse attached to the outer wall of the tank body. The bottom of the tank body has a drain outlet connected to a drain pipe. The bottom of the tank also has an outlet connected to a drinking water outlet pipe. A water pump and a solenoid valve are installed on the outlet pipe. The auxiliary water tank is located above the hot water tank. The auxiliary water tank includes a tank body, a level needle, a vent, and a steam condensation tank that communicates with the upper part of the tank body. The top of the auxiliary water tank body is equipped with a cover, and the level needle and vent are located on the cover. The bottom of the auxiliary water tank body is connected to the interior of the hot water tank body through a channel pipe, and the bottom of the steam condensation tank is connected to the interior of the hot water tank body through a channel pipe. The upper part of the auxiliary water tank body is equipped with a water inlet that communicates with the water inlet pipe.

[0007] Preferably, the heating system of the water purifier further includes: Two solenoid valves are located at both ends of the drain pipe. A one-way valve is located at the end of the inlet pipe furthest from the inlet. The circulating water channel is connected at one end to the middle of the inlet pipe and at the other end to the middle of the outlet pipe. A solenoid valve is installed on the circulating water channel. The second water pump is located on the drain pipe and between the second solenoid valve and the other end of the circulating water channel.

[0008] Preferably, the heating system of the water purifier has a filter cotton inside the exhaust port.

[0009] Preferably, the heating system of the water purifier has a temperature sensor (NTC) installed inside the hot water tank.

[0010] Preferably, the heating system of the water purifier has at least two temperature fuses.

[0011] Preferably, in the heating system of the water purifier, the filter cotton inside the vent is detachably fixed by an elastic card; one end of the elastic card is hinged to the top cover of the auxiliary water tank, and the other end is provided with a buckle. Pressing the buckle can make the card pop up to replace the filter cotton.

[0012] This utility model has at least the following beneficial effects: 1. This utility model provides a novel structure for a heating system of a water purifier, which adopts a combination of a hot water tank and a secondary water tank. The functions of water volume detection, venting, and condensation are placed in the secondary water tank. The hot water tank is designed as an integrated, non-removable structure, retaining only the most basic functions, such as the heating element and the NTC temperature sensor. In this way, the structure of the hot water tank is simplified, reducing the failure rate of the hot water tank. At the same time, the functional structures are integrated into the secondary water tank, which adopts a detachable structure, making production, testing, and fault repair easier. 2. This utility model adopts a combined structure design with a separate hot water tank and an auxiliary water tank. Functional modules such as liquid level detection, venting, and steam condensation are integrated into a detachable auxiliary water tank located above the hot water tank. Simultaneously, the hot water tank is simplified into an integrated, non-detachable structure containing only core components such as the heating element and temperature fuse, significantly simplifying the hot water tank's construction and effectively reducing its failure rate. The detachable design of the auxiliary water tank makes the production, testing, and troubleshooting of functional components such as the liquid level needle and vent filter cotton more convenient, greatly improving maintenance convenience. Furthermore, the simplified hot water tank structure reduces potential leakage points under high temperature and high pressure environments, improving system sealing reliability. The separate design also avoids the scale failure problem caused by long-term immersion of the electronic liquid level detection element in high-temperature water. The centralized treatment of steam in the auxiliary water tank's condensation tank also reduces the risk of scale clogging the venting channel. The temperature fuse's design, attached to the outer wall of the hot water tank, can more sensitively and reliably detect abnormalities such as dry burning and cut off the circuit, enhancing system safety. The overall structural optimization also indirectly improves the system's service life and provides a more optimized foundation for water circulation in the descaling and cleaning mode.

[0013] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the heating system of the water purification mechanism described in one technical solution of this utility model; Figure 2 This is a schematic diagram of the heating system of the water purification mechanism described in another technical solution of this utility model; Figure 3 This is a schematic diagram of the heating system of the water purifier described in another technical solution of this utility model in the water replenishment state; Figure 4 This is a schematic diagram of the heating system of the water purifier described in another technical solution of this utility model in the hot water heating state; Figure 5 This is a schematic diagram of the heating system of the water purifier described in another technical solution of this utility model in the hot water use state; Figure 6 This is a schematic diagram of the heating system of the water purification mechanism described in another technical solution of this utility model in the descaling mode.

[0015] Explanation of reference numerals in the attached diagram: 11-Hot water tank body; 12-Insulated outer shell; 13-Heating element; 14-Temperature fuse; 15-Temperature sensor NTC; 21-Sub-tank body; 22-Level needle; 23-Filter cotton; 24-Steam condenser; 31-Drain pipe; 311-Solenoid valve II; 32-Outlet pipe; 321-Water pump I; 322-Solenoid valve I; 33-Inlet pipe; 331-Check valve; 41-Channel pipe I; 42-Channel pipe II; 5-Circulating water channel; 51-Solenoid valve III; 6-Water pump II. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0017] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0018] It should be noted that, unless otherwise specified, the experimental methods described in the following implementation plan are all conventional methods, and the reagents and materials described are all commercially available unless otherwise specified.

[0019] In the description of this utility model, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] like Figures 1-6 As shown, this utility model provides a heating system for a water purifier, which includes: A hot water tank includes a tank body 11, an insulating outer shell 12 covering the outside of the tank body 11, a heating element 13 disposed in the inner cavity of the tank body 11, and a temperature fuse 14 attached to the outer wall of the tank body 11; the bottom of the tank body 11 is provided with a drain outlet connected to a drain pipe 31; the bottom of the hot water tank is also provided with a water outlet connected to a drinking water outlet pipe 32; a water pump 321 and a solenoid valve 322 are provided on the water outlet pipe 32. The auxiliary water tank is located above the hot water tank body 11. The auxiliary water tank includes an auxiliary water tank body 21, a liquid level needle 22, a vent, and a steam condensation tank 24 that communicates with the upper part of the auxiliary water tank body 21. The top of the auxiliary water tank body 21 is provided with an auxiliary water tank cover, and the liquid level needle 22 and the vent are located on the auxiliary water tank cover. The bottom of the auxiliary water tank body 21 is connected to the inside of the hot water tank body 11 through a channel pipe 41, and the bottom of the steam condensation tank 24 is connected to the inside of the hot water tank body 11 through a channel pipe 42. The upper part of the auxiliary water tank body 21 is provided with a water inlet that communicates with the water inlet pipe 33.

[0021] In the above technical solution, the hot water tank is constructed of stainless steel welded into a sealed enclosure, with only a heating element 13 inside. A thermal fuse 14 is attached to the outer wall of the tank, and thermal grease ensures efficient heat transfer. Two interfaces are located at the bottom of the hot water tank body 11: the left side connects to a drain pipe 31 (with solenoid valve 311), and the right side connects to a drinking water outlet pipe 32 (with a water pump 321 and solenoid valve 322). The entire hot water tank body 11 is covered with an EPP insulated shell 12, with a thickness of 15mm.

[0022] Auxiliary water tank: Located directly above the hot water tank body 11, it consists of a detachable plastic cover and an auxiliary water tank body 21. A three-needle liquid level probe (material SUS316L) is installed in the center of the cover, with the probe tip extending to the lower part of the body; a 5mm diameter vent hole is opened on the side, filled with polyester filter cotton 23. The upper part of the auxiliary water tank body 21 has an integrally formed upward-facing steam condensation tank 24, the bottom of which is connected to the top of the hot water tank body 11 through a second channel pipe 42 (inner diameter 8mm) to facilitate steam introduction; the bottom of the auxiliary water tank body 21 is connected to the upper part of the hot water tank body 11 through a first channel pipe 41 (inner diameter 10mm) for water replenishment.

[0023] Cold water is injected from the inlet of the auxiliary water tank 21 and flows into the hot water tank 11 through the first channel pipe 41. When heating, steam rises to the steam condenser 24 through the second channel pipe 42, and after liquefaction, it returns to the hot water tank 11 through the second channel pipe 42.

[0024] Temperature fuse 14 fits: This means that the metal surface of the fuse is in direct contact with the outer wall of the hot water tank body 11, with a heat-conducting medium (silicone grease) coated in between to ensure real-time temperature synchronization.

[0025] Detachable structure: The top cover of the auxiliary water tank is fixed to the auxiliary water tank body 21 by peripheral buckles. Pressing the buckles can separate the top cover, exposing the installation position of the liquid level needle 22 and the filter cotton 23.

[0026] Steam condensation tank 24: An upward-opening groove structure is provided on the upper inner wall of one side of the auxiliary water tank 21. After the steam comes into contact with the low temperature tank wall, it condenses into droplets.

[0027] In the above technical solution, the hot water tank retains only the core heating component, eliminating the problem of scale failure in the liquid level detection element and extending the maintenance cycle; the auxiliary water tank can be quickly disassembled and assembled, and the replacement time of the liquid level needle 22 or filter cotton 23 is reduced from 2 hours in the traditional solution to 10 minutes; the temperature fuse 14 avoids local dry burning without triggering the protection; the steam is centrally processed in the dedicated condensation tank of the auxiliary water tank, eliminating the pressure fluctuations caused by steam cross-flow in the traditional solution.

[0028] In another technical solution, the heating system of the water purifier further includes: Two solenoid valves are respectively located at both ends of the drain pipe 31; A one-way valve 331 is located at the end of the inlet pipe 33 away from the inlet; The circulating water channel 5 is connected at one end to the middle of the inlet pipe 33 and at the other end to the middle of the drain pipe 31. The circulating water channel 5 is equipped with a solenoid valve 3. The second water pump 6 is located on the drain pipe 31 and between the second solenoid valve and the other end of the circulating water channel 5, which is close to the drain outlet.

[0029] The above scheme adds a closed-loop circulation system: The circulating water channel 5 uses a 6mm inner diameter food-grade silicone tube to connect the middle section of the inlet pipe 33 and the middle section of the drain pipe 31. A normally closed solenoid valve 311 is connected in series in the middle of the channel. A solenoid valve 322 is installed at each end of the drain pipe 31, and a water pump 6 (impeller pump) is installed between the two valves. A one-way valve 331 is added to the end of the inlet pipe 33 to prevent backflow.

[0030] Linkage control logic: When the descaling mode is activated, the first solenoid valve 2 311 (near the drain pipe 31 port) closes, the second solenoid valve 2 311 (far from the drain pipe 31 port) and the third solenoid valve 3 51 open, and the second water pump 2 6 starts. At this time, the liquid in the hot water tank flows sequentially through the drain pipe 31, the second water pump 2 6, the circulating water channel 5, the inlet pipe 33, the auxiliary water tank, and the first channel pipe 41, and finally returns to the hot water tank, forming a closed loop.

[0031] Descaling agent injection mechanism: The descaling agent is injected from the injection port at the front end of the one-way valve 331 at the end of the water inlet pipe 33, and is evenly dispersed throughout the system by the circulating water flow.

[0032] The dynamic circulating water flow impacts the surface of the heating element 13, which is significantly better than static soaking in removing solid scale; the system is pollution-free: the closed-loop design isolates the external environment and avoids secondary pollution caused by disassembly and cleaning; the circulating water channel 5 provides the physical basis for the high-temperature sterilization mode, and can be upgraded to refrigerant circulation to achieve rapid cooling.

[0033] In another technical solution, the water purification and heating system includes a filter cotton 23 inside the exhaust port. The cylindrical polyester fiber filter cotton 23 embedded in the exhaust port has a density of 200g / m³ and a thickness of 2mm, and can intercept particles with a diameter greater than 10μm.

[0034] In another technical solution, the heating system of the water purifier includes a temperature sensor NTC15 inside the hot water tank 11. The NTC15 temperature sensor is a semiconductor element whose resistance decreases as temperature increases; this solution uses a 3950K B-value specification.

[0035] In another technical solution, the heating system of the water purifier has at least two temperature fuses 14 with different specifications (i.e., either the same temperature but from different suppliers, or different temperatures, with the temperature of the temperature fuses being 120-125℃).

[0036] The above technical solution uses two thermal fuses 14 of different specifications; either they must be from different suppliers for the same temperature range, or they must have different temperatures, with a temperature range of 120-125℃. Both fuses are tightly bonded to the casing wall via copper-aluminum composite thermal conductive sheets, which are 0.5mm thick and coated with boron nitride thermal paste. The two fuses are connected in parallel to the circuit; if either fuse blows, the system power supply is cut off.

[0037] like Figure 3 As shown, when the level needle 22 detects that the water level is lower than the low water level setting value during the system water replenishment state, water replenishment is started. Water enters the auxiliary water tank from the inlet and enters the hot water tank through the channel pipe 41. When the level needle 22 detects that the water level has reached the set high water level value, water replenishment is stopped.

[0038] like Figure 4 As shown, in hot water heating mode, when the temperature sensor NTC15 detects that the water temperature is lower than the set lower limit, the heating element 13 starts heating; when the temperature sensor NTC15 detects that the water temperature reaches the set upper limit, the heating element 13 stops heating; during the heating process, the generated steam will enter the steam condensation tank 24 of the auxiliary water tank through the channel pipe 2 42 for cooling and condensation into liquid water; when an extreme abnormality occurs, such as when there is no water in the hot water tank 11, but the heating element 13 starts heating; at this time, the temperature fuse 14 will detect that the hot water tank is dry-burning. When the temperature reaches the fuse's melting value, the temperature fuse 14 will blow, and the system will stop running to avoid natural disaster caused by dry burning.

[0039] like Figure 5As shown, in hot water usage mode, when the temperature sensor detects that the water temperature is lower than the set lower limit, the heating element 13 starts heating; when the temperature sensor detects that the water temperature reaches the set upper limit, the heating element 13 stops heating. During the heating process, the generated steam will enter the condensation zone of the auxiliary water tank through channel pipe 42 to cool down and condense into liquid water. In case of extreme abnormalities, such as a lack of water in the hot water tank but the heating element 13 has started heating, the temperature fuse 14 will detect that the hot water tank is dry-burning. When the temperature reaches the fuse's melting point, the temperature fuse 14 will blow, and the system will stop operating to prevent natural disaster caused by dry burning. The heat insulation shell 12 is made of EPP material, heat resistant to 120℃, and flame retardant V2 level or higher.

[0040] like Figure 6 As shown, in descaling mode, because the heating element 13 is made of metal, scale may form on the surface of the heating element 13 after long-term use, which will slow down the heating time and increase the power consumption. This technical solution provides a descaling mode: 1. Drainage: First, drain the hot water in the hot water tank: Open one solenoid valve 2 311 on the side of the drain outlet near the bottom of the hot water tank body 11, start the water pump 2 6, and start one solenoid valve 2 311 away from the drain outlet at the bottom of the hot water tank body 11. The hot water in the hot water tank body 11 will be discharged from the drain pipe 31. 2. Water replenishment: Descaling agent is added from the inlet of the auxiliary water tank 21 through the tap water pipe (or other water source outlet). The descaling agent follows the water flow and enters the auxiliary water tank 21 and the hot water tank 11. When the liquid level needle 22 detects that the water volume has reached the set upper limit value, water replenishment is stopped. 3. Heating: After the descaling mode is completed and water is replenished, heating element 13 starts heating and stops heating when the water temperature reaches 60℃; 4. Circulation: After the water temperature reaches 60℃, the water in the hot water tank 11 needs to be maintained at 60℃±5℃ and waited for 25-30 minutes to fully dissolve the scale. During the waiting period, the hot water circulation is started periodically: open a solenoid valve 311 near the drain outlet at the bottom of the hot water tank 11, start the water pump 6, and start the solenoid valve 51 on the circulation water channel 5. That is, the water in the hot water tank 11 flows from the bottom of the hot water tank 11 to the auxiliary water tank 21 under the action of the water pump 6, and then enters the hot water tank 11 again from the auxiliary water tank 21, forming a water circulation. The purpose is to create turbulence in the water in the hot water tank 11 so that the descaling agent can fully contact the heating element 13 and improve the descaling efficiency. 5. Drainage: When the descaling time reaches the set time, start the drainage to empty the water in the hot water tank 11. 6. Cleaning: After draining, restart the water replenishment program. After replenishment, start the circulation program for 2 minutes. Then drain the water in the hot water tank again. Repeat this water replenishment-circulation-draining program three times in total to complete the cleaning process. 7. Restart: After completing the cleaning cycle 1-6, refill with water and heat the water to resume normal hot water use.

[0041] The number of devices and processing scale described herein are for the purpose of simplifying the description of this utility model. Applications, modifications, and variations of this utility model will be readily apparent to those skilled in the art.

[0042] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A heating system for a water purification machine, characterized in that, include: A hot water tank includes a tank body, an insulating shell covering the outside of the tank body, a heating element inside the tank body, and a temperature fuse attached to the outer wall of the tank body. The bottom of the tank body has a drain outlet connected to a drain pipe. The bottom of the tank also has an outlet connected to a drinking water outlet pipe. A water pump and a solenoid valve are installed on the outlet pipe. The auxiliary water tank is located above the hot water tank. The auxiliary water tank includes a tank body, a level needle, a vent, and a steam condensation tank that communicates with the upper part of the tank body. The top of the auxiliary water tank body is equipped with a cover, and the level needle and vent are located on the cover. The bottom of the auxiliary water tank body is connected to the interior of the hot water tank body through a channel pipe, and the bottom of the steam condensation tank is connected to the interior of the hot water tank body through a channel pipe. The upper part of the auxiliary water tank body is equipped with a water inlet that communicates with the water inlet pipe.

2. The heating system of the water purifier as described in claim 1, characterized in that, Also includes: Two solenoid valves are located at both ends of the drain pipe. A one-way valve is located at the end of the inlet pipe furthest from the inlet. The circulating water channel is connected at one end to the middle of the inlet pipe and at the other end to the middle of the outlet pipe. A solenoid valve is installed on the circulating water channel. The second water pump is located on the drain pipe and between the second solenoid valve and the other end of the circulating water channel.

3. The heating system of the water purifier as described in claim 1, characterized in that, The exhaust port is equipped with filter cotton.

4. The heating system of the water purifier as described in claim 1, characterized in that, The hot water tank is equipped with an NTC temperature sensor inside the tank.

5. The heating system of the water purifier as described in claim 1, characterized in that, The number of thermal fuses must be at least two.

6. The heating system of the water purifier as described in claim 3, characterized in that, The filter cotton inside the vent can be detachably fixed by an elastic clip; one end of the elastic clip is hinged to the top cover of the auxiliary water tank, and the other end has a buckle. Pressing the buckle will cause the clip to pop up to replace the filter cotton.

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